March 3, 201610 yr I built my unRAID server on Sunday. I got all my data transferred over by Monday. I attempted to do the parity sync overnight Tuesday but it failed and gave me the following error: Description: Array has 1 disk with read errors Importance: warning Parity disk - XXX (sde) (errors 168) I read around the forum and tried reseating the cables. I ran it again overnight and got the following error: Description: Array has 1 disk with read errors Importance: warning Parity disk -XXX (sde) (errors 384) I would think if the drive was bad I would be getting write errors instead of read errors. I currently have 2 other 4 TB drives (HGST NAS ones) and a 500 GB cache. I am attaching the syslog and smart log below. Any help would be appreciated. The errors in the Syslog start around 1:14 am. Thanks Edited June 3, 20224 yr by lotrfan18 Anonymyzing Data
March 3, 201610 yr Community Expert SMART indicates drive is not accessible. Check connections. Please don't post syslogs for V6, we need diagnostics zip. See v6 help in my sig.
March 3, 201610 yr Community Expert Also the syslog is full of write error messages for the parity drive. Probably related to it dropping offline for some reason.
March 3, 201610 yr Author Here's the problem though. It seems as if the sync is perfectly fine until the very end. Both times the sync has run for close to 6 hours before it fails at 95+%. I'm not sure why smart can't read the disk now, but it seems that other places in the system can see it. Should I try changing out the sata cable and plug it into a different sata port? Also the entire zip is attached. Edited June 3, 20224 yr by lotrfan18 Anonymyzing Data
March 3, 201610 yr Community Expert Disk is offline, you have to power cycle the server and get new diagnostics, but if it happened more than once at the same position it’s probably a bad disk.
March 3, 201610 yr Author On 3/3/2016 at 10:00 AM, trurl said: Tell us more about your hardware. [Redacted] Edited June 3, 20224 yr by lotrfan18 Anonymyzing Data
March 3, 201610 yr Author On 3/3/2016 at 10:01 AM, johnnie.black said: Disk is offline, you have to power cycle the server and get new diagnostics, but if it happened more than once at the same position it’s probably a bad disk. Power cycled, took the parity drive off the array, started the array, stopped, then readded the parity and re-ran the diagnostics. See attached. Edited June 3, 20224 yr by lotrfan18 Anonymyzing Data
March 3, 201610 yr Community Expert SMART for parity looks OK but you might try preclearing the parity disk to see if it passes.
March 3, 201610 yr You could have a disk that's actually bad; or you may be having a memory stability issue. Remove two of your memory modules and re-initialize the array [ "New Config"] and see if the parity sync completes okay. You may also want to spend a couple days running pre-clears on the disks to give them a thorough workout before doing this.
March 3, 201610 yr Community Expert Device Model: WDC WD40EFRX-68WT0N0 Serial Number: WD-WCC4E83R29CN Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Completed: read failure 10% 70 2589560248 Disk failed SMART test, replace.
September 26, 20178 yr Hello@johnnie.black I actually started another thread with a similar problem. Every time I try to start a parity-sync, it fails and shows me a few read errors. I've pre cleared both data and parity drives, but the problem persists. Any ideas? I'll try again this evening with a fresh UNRAID installation and, if it doesn't chance, I'll try with another Mobo. Thank you, Sanches. tower-diagnostics-20170926-1644.zip
September 26, 20178 yr Community Expert 8 minutes ago, Sanches said: Any ideas? Yes, remove all disks from the Marvell ports (the first 4 white SATA ports), use only the Intel ports and your troubles will be over.
September 26, 20178 yr 1 hour ago, johnnie.black said: Yes, remove all disks from the Marvell ports (the first 4 white SATA ports), use only the Intel ports and your troubles will be over. Trying it right now! I'm really confident now! If it works, I owe you a beer!
September 27, 20178 yr 14 hours ago, johnnie.black said: Yes, remove all disks from the Marvell ports (the first 4 white SATA ports), use only the Intel ports and your troubles will be over. @johnnie.black, it worked!!!!!! Thank you very much!
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